351312222 has 32 divisors (see below), whose sum is σ = 717518592. Its totient is φ = 114643584.

The previous prime is 351312217. The next prime is 351312253. The reversal of 351312222 is 222213153.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64518 + ... + 69750.

It is an arithmetic number, because the mean of its divisors is an integer number (22422456).

Almost surely, 2^351312222 is an apocalyptic number.

351312222 is an abundant number, since it is smaller than the sum of its proper divisors (366206370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

351312222 is a wasteful number, since it uses less digits than its factorization.

351312222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5472.

The product of its digits is 720, while the sum is 21.

The square root of 351312222 is about 18743.3247317545. The cubic root of 351312222 is about 705.6095005752.

Adding to 351312222 its reverse (222213153), we get a palindrome (573525375).

The spelling of 351312222 in words is "three hundred fifty-one million, three hundred twelve thousand, two hundred twenty-two".